Method of treating composite strip products



May26,1942. c. BATCIHELLER V r 2,284,254

METHOD .OF TREATING COMPOSITE STRIP PRODUCTS Filed Jul 2 0, I938C/eme/ws fiafc/wfler P76. 6 I "&9

ATTO/P VE Yr stiff paper or light cardboard. j

Patented May 26, 1942 METHOD OF TREATINGCOMPOSITE STRIP u PRODUCTSClements Batcheller, Glens Falls, N. Y., assignor to Allegheny LudlumSteel Corporation, a corporation of Pennsylvania Application July 20,1938, Serial No. 220,326 I V 4 Claims. My'invention particularly relatesto a method of providing the facing element of a flexible compositestrip product which comprises a facing element of thin. flexible,'preferably'corrosion-resistant, metal with a substantially even,unwarped surface.

Under cold rolling processes, exceedingly thin cause of their highresistance to corrosion, lightness in weight per unit of surface area,cheap ness as compared to like corrosion-resistant alloy steels ofheavier gauge and aesthetic and enduring properties as compared toordinary carbon steels. Such thin, paper-thin gauge strips when combinedwith a suitable backing of flexible, yieldable material form a veryuseful, composite product which is particularly adapted for such uses.

Corrosion-resistant metals such as chromiumcontaining alloy steels, whencold rolled to such extremely thin gaugea'work-hardento a conlie flatand they are otherwise diflicult to work.

However, when such strips are combined with a suitable backing as, forexample, of the character hereinafter pointed out, they may be easily 1154-2) b elements being preferably afiected by-heavy external pressure.1

Among the adhesives which are very suitable areclay base asphalticemulsionsof the-stable type, synthetic resins and even special latexcements, all of Which because they-are capable of yieldingto some degreewithout ruptureg produce a very strongand effective bond-but do notreduce the flexibility of the finished composite product when dry. 1

A composite product comprising a facing. element of thin,corrosion-resistant, alloysteel of the character above pointed outhaving affixed thereto, by means of an adhesiveof .the'foregoingcharacter, a backing of the type ,herein referredrto, may be easilyworked, out and the like; is flexible and may be rolled,coiled or bentwithout rupturing and this is made possible in part because ofthecharacter of the backingmaterlals which are flexible, easily cut andpossess that degree of .give? or slight extensibility andcornpressibility which is necessary to permitthe composite product to berolled orcoiled without rupturingq- Q Such composite strip products,however, when fabricatedinwidths, for-example, of "about 27",

' provide substantial surface areas which, due primarily to ,the methodsinvolved in the formation of the metal facing, are uneven and warped.Marked warping, occurs in the marginal zones of the strip.andsubstantially throughout the length thereof; :Undersuch conditions,the" strips when aflixed to a wall orother supporting surface withtheir-side edges in abutting relationship do not worked; may be cut, forexample, with ordinary.

shears and may be rolled; coiled, bent and used practically withthe samefacility as'ordinary A suitable and cheap, flexible, yieldable backingsmay be, for example, a loosely felted mineral fibre mat, a heavy wovenfabric, latex impregnated paper, or a rollable, paper board product. Thebacking is affixed to'the thin metal facin by means of a suitableadhesive orcement, the

union or bonding of the facing andthe backing provide a neat appearance.Furthermore, warped areas occur in the central zones of the strips-s0that, when-mounted, for example, 'on a flat surface, the strips have anuneven and slightly rolling or undulating appearance.

It is, therefore, the primary object of my invention to provide a methodwhereby themaior portion of thesurface of the facing, of suchcompositenproducts may be renderedfsubstantially even; and .unwarped andanother object resides in providing a method for, treating s'uchproductswhereby not only are the above v results produced in an extremelycheapandlemcient manner but the properties of rollability, fflexibility andworkability, above referred to, of the strip are preserved and, also,the appearance of the finished, strip product is in no way impaired but,on the other hand, rendered decorative.

The manner in which these andother objects are-attained in, the practiceof the method of my invention as set forthin the following will best Ipers'pective viewoi' acompo'site, strip product; I j i Fig. 2 is anenlarged; fragmentary sectional view of;a#marginal portion of; thecomposite product illustrating one mann'erfin' which it may be treatedin accordance with my'invention;

. Fig. 3 is a fragmentary plan view of the strip f i productillustrating marginal a ,Fig. sis aviewsimilartorig'. 3 but illustratscores thereinp ing an exemplaryarrangement'of a completely; wtreatedstrip product: [i Fig. 5 is a somewhat enlargedend elevation Fig. 6 is aview similar tolig. 2 but illustrat ing a modified manner of treating orscoring the I view of P18. 4;

strip product;

Fig. '1 illustrates the configuration of themar- 211131 portion of thestrip shownamll 'ig g t ithasbeenscored;

Fig. fl illustrateslone form of apparatusfor carrrins out-my method?ther more," in the central portion: of the strip ,i "products will befound areas; such 'asdndicated by the shaded portions}, which jare'somewhat v 40 a parallehgroovesgor scores as indicated at 'l in jconcave or depressedbelowthe-surroundingsurportions causing: thestripjto havefaniun 'dulating appesrancem least in p'arhin ,the' cen- Ktral portions thereof. Strip products 'which are A v: .warped in thismanner "do not presentadesirable 7 23843254 be understood byreference tothe accompanying drawinginwhich--- 1 is asom'ewhatexaggeratedfiragmentary ofeb on-resistant" alloy steel and a backing ofyieldable," flexible material.

formed. warping in the-marginal portions of the'strip'thereby providlngit with undulating comprising "depressions such as indicated 'jat' lwith crests; or ridges I therebetweens. Fur

' Initially, when m the renewing, mam. although 1 will describedmymethod with reference to subjecting the; strip product to a scoringoperation,

I it is to be understood that, in accordanc'e'with 5 the principles ofmy invention, I may subject v the strip to operations which will producedeformatio'ns 1 of the characters above pointed out.

In treating astrip product; primarily for the purpose of removing oreliminating warping in strip extending in'a direction-generallylengthwise thereofandgsubstantially parallel to its say about 1% 'yr to1"..' the strip product is preferably subjected to: the

lustrated m Fig. and, in facing is preferably caused to penetrate, thebacking'fa distance; suilicient to} renderthe major portion ofthe'suriacelthereof substantially even and unwarpecl but insufli'cientmaterially to aflect the flexibility;;bqndability and rollability or thestrip product. I Withithis arrangement, though the r oves ordeiormationsmay e rtendlength- Y wise ,of v the strip the 'y no not prevent rolling,

bending and coilingof the,strip in part; orin its entirety p r s ,g V

In order to p vide' the. central portion of' the strip-product with}substantially even surface vandeliminatev therein, where it ,ofsubstantial. width .;similar linear deformations such as groovesvordepr'essionsQlike. those indicated at I, are formed inthe'e ntral zoneoffthe Y ."l'strip andi preferably eitend lengthwise thereof.

about; 24:}, 1 have .Ifound that two substantially ,Fig. 4 may be:formed in the central zone of the lstrip spaced about 6" apart. iScoresjmay; be

formed in like manner as scores linftheifacing 'the'marginal zonesthereofpa score," indicated at. his; formed in the marginal zoneof theedge. A score I'is preferably formedon each: sideioftheistrip and theyare preferably spaced a' short distance'Ifrom the sideedges thereof,

The facing element of scoringoperationthereby forming substantiallyV-shapedfi grooves or depressions therein as 11- the strip product be ofaIwidth of even; 'nietallic surface appearancefandof course, [42:01? thes p. oduct and, serve substantially if mounted'witlf-theirside edgesinabuttingnre completely to eliminate undulations or :warping 1 tinshipftheas'seinbly' of' adjacentgstrips'does- 'Ewhichmayotherwise;existin;the ecentral aoneof not'a pearn'eat nororderlyb' 5;;ztlie;strip-nroduct.;l3y providingjthe stnpswith ;I have-foundthatjit'is ible'substantially: {li l- ,035 J. and l the major portion1orsubtoffeliminatesuch undesirableiwarped conditions lo stantiallwthe Ientire surface of the, composite.

provide "the""stripawith a substantially f-=st s pi1nrqdllctysave ofcourse, f!orjthe" scoresa smoothgeven surface by producing-a linear d s,therein. is substantially even'a'nd unwarpeld' as formatlonin or'admenrthe zones of said stripf 'whe'r'ein warping occurs; It isonly"'necessary "to 'produee'linear or line-like deformations infthe'strip or'a deformationin a comparatively narrow zone {thereofalthoush, of course, deformation's of greater width may be" formedzlandfthese deformations preferably extend longitudimuy er the strips; whenso arranged to'extend substantially tnrcughourthe length of the strip,I, f fisuch' deformations may Deformed-economically "a an at the sametime; they enhance -to some.

iiieg' the-aesthetic properties oftheg flnished v f; 7 f I preferto"createthesedefdrmations' by-score 'ing gthe' strip product. Thisoperation may be ridges, of course, may be'linear-or line-like.

1 Obvious strips of appreciably ,les'se 7 width! as" than thatfiaboveassumed] my "a provided with 'smooth,..even surfaces-by providing asmaller number of, scores therein and the, number and arrangement ofsuch or linear deformationsmay; bee-varied a s desiredfor decorative *ivm andt e ke- V e v. 1

' In Figs. BandELYI'liave illustrated a second manner in ,1 which ,theistripproducts may be 1, treatedf to. provide them with; smooth, substan-.tially' unwfarpdfl facing j elements. The'bacting jgelement Q 'of the icomposite? iproduct" may' be scored, as indicatedf at practically "inthose mnesflwhere .otherwise the grooves 1 would be formed on thereverseside-thereof. Eollowing thei'scoring operation, the marginalportion's -of the strip'between the scores l and the} edgeszwlll besprung-"or slightly bent as illustrated Fig;

' ff-Tand, of coursefwhen. thesstripiis 'afllxedrtoa flat" surface,sthevmarginal'iportions be bent back substantially in ,the. planeof' thecentral portion of the'surface thereof. The protral zone of the backing3 in substitution for.

the scores 8 above described.

Fig. 8 discloses one manner in which the strip products may be providedwith grooves or scores.

surface of the facing element thereof is rendered substantially smoothand even over the major portion thereof while the deformations, scoresor 'ridges, serve additionally to provide adesirable decorative effect,serving to reduce the plainness of a surface formed entirely of suchstrip'prod- I indicates a roller over which thestrip I mayv be passedand an arbor II may berotatably mounted thereabove, carrying scoringdiscs I2 and I3. The discs I2 are arranged to form the scores 1 in themarginal zones of the strip I .5 and discs I3 may be properly spaced asdesired 1 true scope and spirit, of my invention in its 4 to form thescores 8 in the central zone of the strip product. Beveled, formingwheels I4 may be mounted on the arbor II adjacent the discs l2 forbeveling the side; edges of the strip: I where it is desired to providebeveled-edge strips which will afford a more pronounced'line of (18-?marcation when mounted with their'side edges adjacent each other.

parent that the method above described may be economically andexpediently carried out and the means employed may be of a fairlyinexpen sive and simple construction such as that il-1.f

lustrated in Fig. 8.

In Fig. 9, I have illustrated the strip product, I

provided with a ridge I5 instead of a groove forf the purpose ofproviding the strip with a smooth. even surface over the major portionthereof v z-l To form a linear deformation of this character,

a roller I6 may be provided, as shown in Fig);

10, over which the strip I is passed with the facv ing element 2 thereofin contact with the-roller. An arbor I'I carrying a forming tool I8maybe rotatably mounted over roller IS with the tool M in cooperativerelationship to a circumferential groove I9 in the roller and insufficiently close the strip I as illustrated. A multiplicity." of

grooves and forming tools, of course, may be provided simultaneously toform a plurality of ridges in the strip I in the same manner as thescoring operation is carried outwith the apf; I

paratus of Fig. 8. i It should be noted that the strip product bedeformed in the manners above indicated to render the major portion ofthe strip surface strip. For example, assuming that the facing of acomposite strip of a thickness of about fif'is' scored 0r grooved, suchgrooves may be'formedof a depth up to about 3 5" to provide a smooth,

unwarped surface over substantially the major portion of the strip andyet the strip may be 'fiexed, rolled and bent with substantially thesame facility as before being grooved.

ucts arranged side by side in abutting relationship. I

. Ience, while I have dcscribedmy invention in j-itS preferredembodiments, it is to be understood that the w ordsswhich I haveused arewords claims may be made without departing from the broader aspects. 7

What I claim is:

1. The method of eliminating undulations in a rollable composite stripproduct comprising a facing of thin gauge corrosion-resistant alloysteel and a backing of comparativelyyieldable I sheet materialadhesively secured to said facing v which comprises producing asubstantially linear deformation of said product'extending through saidundulations in a direction longitudinally of said product; the depth ofsaid linear deformation being insufiicientto prevent said product frombeing easily rolled in the direction thereof.

The method of eliminating undulations in a rollable composite stripproduct comprising a facing. of thin gauge corrosion-resistant alloysteel and a backing of comparatively yieldable sheet materialadhesively'secured to said facing which comprises scoring saidproductalong aplurality of substantially parallel lines extending through saidundulations and in a direction longitudinally of said product; the depthor extent of the deformations being insuflicient to prevent the easylongitudinal rolling of said 'product, proximity to produce the ridgedeformation in I 3.'The method of eliminating. undulations in 'arollable composite strip product" comprising a facing of thin gaugecorrosion-resistant alloy steel and a backing of comparatively yieldablesheet material adhesively secured to said facing which comprisesscoring'said product longitudinally and through the zones of theundulations therein; the depth of the scoring being insufficient toprevent the easy, longitudinal rolling of said product.

4. The method of eliminating undulations in the marginal zones of arollable composite strip product comprising a facing of thin gaugecorrosion-resistant alloy steel and a backing of com parativelyyieldable sheet material adhesively.

secured to said facing which comprises scoring I said'productlongitudinally along the marginal edges thereof; the depth of saidscoring being insufficient to prevent said product from being readilyrolled in a direction longitudinally there- CLEMENTS BATCHEILER.

' Bylinearly deforming the strip product, the'

